-84.29% is the change from 70 to 11
Calculation steps:
[( 11 - 70 ) ÷ 70] x 100 = -84.29%
Formula
Percentage change = [(11 - 70) / 70] x 100
Subtract the new number by the original number
11 - 70 = -59
-59 ÷ 70 = -0.8428571428571429
-0.8428571428571429 x 100 = -84.29%